Root/drivers/hid/hid-lg2ff.c

1/*
2 * Force feedback support for Logitech RumblePad and Rumblepad 2
3 *
4 * Copyright (c) 2008 Anssi Hannula <anssi.hannula@gmail.com>
5 */
6
7/*
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23
24#include <linux/input.h>
25#include <linux/slab.h>
26#include <linux/usb.h>
27#include <linux/hid.h>
28
29#include "usbhid/usbhid.h"
30#include "hid-lg.h"
31
32struct lg2ff_device {
33    struct hid_report *report;
34};
35
36static int play_effect(struct input_dev *dev, void *data,
37             struct ff_effect *effect)
38{
39    struct hid_device *hid = input_get_drvdata(dev);
40    struct lg2ff_device *lg2ff = data;
41    int weak, strong;
42
43    strong = effect->u.rumble.strong_magnitude;
44    weak = effect->u.rumble.weak_magnitude;
45
46    if (weak || strong) {
47        weak = weak * 0xff / 0xffff;
48        strong = strong * 0xff / 0xffff;
49
50        lg2ff->report->field[0]->value[0] = 0x51;
51        lg2ff->report->field[0]->value[2] = weak;
52        lg2ff->report->field[0]->value[4] = strong;
53    } else {
54        lg2ff->report->field[0]->value[0] = 0xf3;
55        lg2ff->report->field[0]->value[2] = 0x00;
56        lg2ff->report->field[0]->value[4] = 0x00;
57    }
58
59    usbhid_submit_report(hid, lg2ff->report, USB_DIR_OUT);
60    return 0;
61}
62
63int lg2ff_init(struct hid_device *hid)
64{
65    struct lg2ff_device *lg2ff;
66    struct hid_report *report;
67    struct hid_input *hidinput = list_entry(hid->inputs.next,
68                        struct hid_input, list);
69    struct list_head *report_list =
70            &hid->report_enum[HID_OUTPUT_REPORT].report_list;
71    struct input_dev *dev = hidinput->input;
72    int error;
73
74    if (list_empty(report_list)) {
75        hid_err(hid, "no output report found\n");
76        return -ENODEV;
77    }
78
79    report = list_entry(report_list->next, struct hid_report, list);
80
81    if (report->maxfield < 1) {
82        hid_err(hid, "output report is empty\n");
83        return -ENODEV;
84    }
85    if (report->field[0]->report_count < 7) {
86        hid_err(hid, "not enough values in the field\n");
87        return -ENODEV;
88    }
89
90    lg2ff = kmalloc(sizeof(struct lg2ff_device), GFP_KERNEL);
91    if (!lg2ff)
92        return -ENOMEM;
93
94    set_bit(FF_RUMBLE, dev->ffbit);
95
96    error = input_ff_create_memless(dev, lg2ff, play_effect);
97    if (error) {
98        kfree(lg2ff);
99        return error;
100    }
101
102    lg2ff->report = report;
103    report->field[0]->value[0] = 0xf3;
104    report->field[0]->value[1] = 0x00;
105    report->field[0]->value[2] = 0x00;
106    report->field[0]->value[3] = 0x00;
107    report->field[0]->value[4] = 0x00;
108    report->field[0]->value[5] = 0x00;
109    report->field[0]->value[6] = 0x00;
110
111    usbhid_submit_report(hid, report, USB_DIR_OUT);
112
113    hid_info(hid, "Force feedback for Logitech RumblePad/Rumblepad 2 by Anssi Hannula <anssi.hannula@gmail.com>\n");
114
115    return 0;
116}
117

Archive Download this file

Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master

Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9



interactive